// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)

#pragma once

#ifndef SPDLOG_HEADER_ONLY
#include <spdlog/sinks/stdout_sinks.h>
#endif

#include <memory>
#include <spdlog/details/console_globals.h>
#include <spdlog/pattern_formatter.h>

#ifdef _WIN32
// under windows using fwrite to non-binary stream results in \r\r\n (see issue #1675)
// so instead we use ::FileWrite
#include <spdlog/details/windows_include.h>

#ifndef _USING_V110_SDK71_  // fileapi.h doesn't exist in winxp
#include <fileapi.h>        // WriteFile (..)
#endif

#include <io.h>     // _get_osfhandle(..)
#include <stdio.h>  // _fileno(..)
#endif              // WIN32

namespace spdlog {

namespace sinks {

    template <typename ConsoleMutex>
    SPDLOG_INLINE stdout_sink_base<ConsoleMutex>::stdout_sink_base(FILE* file)
        : mutex_(ConsoleMutex::mutex()), file_(file), formatter_(details::make_unique<spdlog::pattern_formatter>())
    {
#ifdef _WIN32
        // get windows handle from the FILE* object

        handle_ = reinterpret_cast<HANDLE>(::_get_osfhandle(::_fileno(file_)));

        // don't throw to support cases where no console is attached,
        // and let the log method to do nothing if (handle_ == INVALID_HANDLE_VALUE).
        // throw only if non stdout/stderr target is requested (probably regular file and not console).
        if (handle_ == INVALID_HANDLE_VALUE && file != stdout && file != stderr)
        {
            throw_spdlog_ex("spdlog::stdout_sink_base: _get_osfhandle() failed", errno);
        }
#endif  // WIN32
    }

    template <typename ConsoleMutex> SPDLOG_INLINE void stdout_sink_base<ConsoleMutex>::log(const details::log_msg& msg)
    {
#ifdef _WIN32
        if (handle_ == INVALID_HANDLE_VALUE)
        {
            return;
        }
        std::lock_guard<mutex_t> lock(mutex_);
        memory_buf_t formatted;
        formatter_->format(msg, formatted);
        auto size = static_cast<DWORD>(formatted.size());
        DWORD bytes_written = 0;
        bool ok = ::WriteFile(handle_, formatted.data(), size, &bytes_written, nullptr) != 0;
        if (!ok)
        {
            throw_spdlog_ex("stdout_sink_base: WriteFile() failed. GetLastError(): " + std::to_string(::GetLastError()));
        }
#else
        std::lock_guard<mutex_t> lock(mutex_);
        memory_buf_t formatted;
        formatter_->format(msg, formatted);
        ::fwrite(formatted.data(), sizeof(char), formatted.size(), file_);
#endif                    // WIN32
        ::fflush(file_);  // flush every line to terminal
    }

    template <typename ConsoleMutex> SPDLOG_INLINE void stdout_sink_base<ConsoleMutex>::flush()
    {
        std::lock_guard<mutex_t> lock(mutex_);
        fflush(file_);
    }

    template <typename ConsoleMutex> SPDLOG_INLINE void stdout_sink_base<ConsoleMutex>::set_pattern(const std::string& pattern)
    {
        std::lock_guard<mutex_t> lock(mutex_);
        formatter_ = std::unique_ptr<spdlog::formatter>(new pattern_formatter(pattern));
    }

    template <typename ConsoleMutex> SPDLOG_INLINE void stdout_sink_base<ConsoleMutex>::set_formatter(std::unique_ptr<spdlog::formatter> sink_formatter)
    {
        std::lock_guard<mutex_t> lock(mutex_);
        formatter_ = std::move(sink_formatter);
    }

    // stdout sink
    template <typename ConsoleMutex> SPDLOG_INLINE stdout_sink<ConsoleMutex>::stdout_sink() : stdout_sink_base<ConsoleMutex>(stdout) {}

    // stderr sink
    template <typename ConsoleMutex> SPDLOG_INLINE stderr_sink<ConsoleMutex>::stderr_sink() : stdout_sink_base<ConsoleMutex>(stderr) {}

}  // namespace sinks

// factory methods
template <typename Factory> SPDLOG_INLINE std::shared_ptr<logger> stdout_logger_mt(const std::string& logger_name)
{
    return Factory::template create<sinks::stdout_sink_mt>(logger_name);
}

template <typename Factory> SPDLOG_INLINE std::shared_ptr<logger> stdout_logger_st(const std::string& logger_name)
{
    return Factory::template create<sinks::stdout_sink_st>(logger_name);
}

template <typename Factory> SPDLOG_INLINE std::shared_ptr<logger> stderr_logger_mt(const std::string& logger_name)
{
    return Factory::template create<sinks::stderr_sink_mt>(logger_name);
}

template <typename Factory> SPDLOG_INLINE std::shared_ptr<logger> stderr_logger_st(const std::string& logger_name)
{
    return Factory::template create<sinks::stderr_sink_st>(logger_name);
}
}  // namespace spdlog
